The M249 Box magazine features an easy load opening at the top of the magazine, which holds 2,500 BBs! The Atlas Custom Works M249 Box magazine is powered by two AA batteries (not included), which can be easily installed into the side of the box magazine. This magazine is a must have for any airsoft heavy SAW gunner!. Shop box magazines for M249, M60, and Stoner airsoft LMGs. High-capacity options keep your support airsoft gun firing longer in games.
Magazine capacity: 3000rds For G&P M249 & MK46 Series Controlled by a circuit sensor, BBs will be loaded automatically from the ammo box when the trigger is pulled Inner have electric sensor driven. The A&K Box Mag for the M249 functions the exact same way the Classic Army version does. It has an auto winding feature with a button at the bottom of the mag and is powered by a single 9volt battery. Press the button to wind the mag and then fire! This magazine is recommended for use with A&K M249 guns only. These magazines may work with other brands but they cannot be guaranteed by Airsoft.